arguments." today, during a highly publicized visit to israel, president obama assure benjamin netanyahu that the u.s. will do everything in its power to prevent iran from retaining nuclear weapons. so what do you think? will this policy work? will the president's vow to deter iran from a nuclear strategy actually do that? you can weigh in or tweet us at nightline or at terry moran. "world news now" is next with overnight breaking news. check in with "good morning america." they're working while you're sleeping and we're always online at abcnews.com.